It is very unlikely to find a fully modular, average wattage PSU that performs decently in this price range, so the Silverstone ST50F-P earns a point here. Also overall efficiency was good, it was especially impressive with loads below 100W. What troubled me the most was that above 43°C ambient, the PSU couldn't handle even 450W of load and kept shutting down. The manufacturer clearly states that the maximum operational ambient is 40°C, however the ATX specification recommends 50°C. Also I would like to see voltage regulation at +12V within 3% and 3.3V within 5% at least. A pleasant surprise was the close to 2% voltage regulation at 5V but I would prefer a more stable 12V at the cost of weaker 5V.

Silverstone's ST50F-P is an affordable PSU with fully modular cabling that will be a decent choice for powering small systems with a mid-range graphics card. If it could handle the heat and do full power at 45-50°C then it would compensate the bad overall performance of 3.3V and earn an even better rating, but unfortunately this was not the case.